Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual pista foi usada em 12 de setembro de 1981?
 ###Tabelas: CREATE TABLE schedule_and_results (schedule_and_results_id AUTO_INCREMENT PRIMARY KEY, Rnd INT, Date VARCHAR, Race Name VARCHAR, Length VARCHAR, Track VARCHAR, Location VARCHAR, Type VARCHAR, Pole Position VARCHAR, Winning Driver VARCHAR) CREATE TABLE composition_of_the_7th_seanad (composition_of_the_7th_seanad_id AUTO_INCREMENT PRIMARY KEY, Administrative Panel INT, Agricultural Panel INT, Cultural and Educational Panel INT, Industrial and Commercial Panel INT, Labour Panel INT, National University of Ireland INT, University of Dublin INT, Nominated by the Taoiseach INT, Total INT) CREATE TABLE middleweight___77_kg (middleweight___77_kg_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Bodyweight INT, Snatch INT, Clean & Jerk INT, Total (kg) INT) CREATE TABLE contestants_and_final_ranking (contestants_and_final_ranking_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Category VARCHAR, Eliminated VARCHAR, Date VARCHAR, Special Guest VARCHAR) CREATE TABLE nab_cup_and_premiership_season_results (nab_cup_and_premiership_season_results_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Opposition VARCHAR, Time VARCHAR, Date VARCHAR, Home/Away VARCHAR, Venue VARCHAR, Score VARCHAR, Result/Margin VARCHAR, Broadcaster VARCHAR, TV VARCHAR, Ladder Position VARCHAR)  
SELECT Track FROM schedule_and_results WHERE Date = September 12, 1981